Single-pair wire can deliver power in addition to 10Mbps: * https://en.wikipedia.org/wiki/Power_over_Ethernet#PoDL https://en.wikipedia.org/wiki/Power_over_Eth

Single-pair wire can deliver power in addition to 10Mbps: * https://en.wikipedia.org/wiki/Power_over_Ethernet#PoDL https://en.wikipedia.org/wiki/Power_over_Ethernet#PoDL * https://blog.siemon.com/standards/ieee-p802-3cg-10-mbs-single-twisted-pair-ethernet-task-force https://blog.siemon.com/standards/ieee-p802-3cg-10-mbs-singl... Not sure what kind of distance-dropoff trade-off there is: > For example, at 55V and 1000m, 7.7W can be delivered to the endpoint. At shorter distances, 55V and 150m, 52W can be delivered to the endpoint. * https://ethernetalliance.org/wp-content/uploads/2021/07/EA_TechBrief-SPE-SPoE_FINAL.pdf https://ethernetalliance.org/wp-content/uploads/2021/07/EA_T... Eval board here: * https://www.analog.com/en/products/adin1100.html#product-evaluationkit https://www.analog.com/en/products/adin1100.html#product-eva... All of this is meant for bulk purchases in the industrial/embedded/automation/SCADA space, so small-batch hobbyist purchases may be expensive.